diff --git a/lib/cli/cli.js b/lib/cli/cli.js
index 2bdc5bd49..a1b9fdbe3 100644
--- a/lib/cli/cli.js
+++ b/lib/cli/cli.js
@@ -644,7 +644,8 @@ export async function parseCommandLine() {
     })
     .option('browsertime.firefox.includeResponseBodies', {
       alias: 'firefox.includeResponseBodies',
-      describe: 'Include response bodies in HAR',
+      describe:
+        'Warning: This do not work at the moment, see https://github.com/sitespeedio/sitespeed.io/issues/4295',
       default: 'none',
       choices: ['none', 'all', 'html'],
       group: 'Firefox'